Home / 21,231.54-29,302.80-15,282.90

Finding the Fourth Proportional to 21,231.54, 29,302.80 and 15,282.90

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Solution

The fourth proportional to 21,231.54, 29,302.80 and 15,282.90 is: 21,092.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,231.54 : 29,302.80 = 15,282.90 : x
  2. Step 2: Convert to fraction form
    21,231.54/29,302.80 = 15,282.90/x
  3. Step 3: Cross multiply
    21,231.54x = 29,302.80 × 15,282.90
  4. Step 4: Simplify right side
    21,231.54x = 447,831,762.12
  5. Step 5: Solve for x
    x = 447,831,762.12/21,231.54
  6. Step 6: Final answer
    x = 21,092.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.